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(!!!!) (Recommended Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1% matched (53-54/40 x 2 tubes)
(!!!!) (Recommended Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1% matched (53-54/40 x 2 tubes)
By Tube World
$ 39.99
1 pair) 6X4 SER = LM Ericsson Sweden NOS "D" getter 1950's 1% matched in white boxes
1 tube) 53/40 and 54/40
1 tube) 53/40 and 54/40
Aktiebolaget Svenska Elektronror = Limited Company Swedish Electron Tubes
Recommended for
Audio Note DAC 1.2
LAMM LP2 phono
KONDO KSL M7 preamp
Kondo M77 preamp
Eastern Electric Minimax Phono
Pultec EQ
Wright WPP200C
Audio Note M7
See more: vacuum tube
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 (Recommended Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1% matched (53-54/40 x 2 tubes) "Pin It")